35results about How to "Output power adjustment" patented technology

The invention belongs to the technical field of wind power generation, and particularly provides a power adjusting method and a power adjusting device in a wind farm. The method comprises the following steps of: 1) acquiring an effective power demand value of the wind farm in real time, and taking the effective power demand value as target output power Pr of the wind farm; 2) acquiring the current actual output power P of the wind farm; 3) calculating a power adjusting value of the wind farm according to the current actual output power P and the target output power Pr of the wind farm; 4) determining a power adjusting strategy on the basis of the power adjusting value; and 5) controlling the working state of corresponding fans in the wind farm on the basis of the power adjusting strategy; and repeating the step 2) to the step 5), till the output power of the wind farm meets the power demand of a power grid. In the power adjusting method and the device provided by the invention, the output power of the wind farm can be adjusted in time and accurately, the stability and the safety of the operation of the fans are improved and the labor cost also can be greatly saved simultaneously.

The invention relates to an induction cooker control circuit suitable for cookers of different materials. The induction cooker control circuit comprises an IGBT (Insulated Gate Bipolar Translator), an IGBT driving module, an LC (Launch Control) resonance circuit, a central processing unit, a synchronous sampling circuit and a sampling circuit, wherein the LC resonance circuit is connected with the IGBT, and the central processing unit is connected with the IGBT driving module; the synchronous sampling circuit is electrically connected with the LC resonance circuit; and the sampling circuit is connected with the central processing unit and provides current and voltage signals. The control circuit also comprises a resonance frequency sampling circuit which is used for sampling a resonance frequency generated when the cookers of different materials work. The sampling point of the resonance frequency sampling circuit is arranged at the output end of the synchronous sampling circuit, and the output end of the resonance frequency sampling circuit is connected with the central processing unit. The output power and a power preset value are compared and the collected resonance frequency and a resonance frequency preset value are compared to judge whether the resonance frequency is beyond the resonance frequency range of safe working of an induction cooker or not. The output power of an electromagnetic coil is adjusted through the IGBT, so that a main loop working current works in a rated range, and therefore the safe working of the induction cooker is protected.

The invention discloses a photosensitive LED lamp. The photosensitive LED lamp comprises a power supply unit, an MCU (micro controller unit), a photosensitive sensor, a power adjustment unit and an LED lamp body, wherein power supply input ends of the MCU, the photosensitive sensor and the power adjustment unit are electrically connected with the power supply unit respectively; an output end of the photosensitive sensor and a control input end of the power adjustment unit are electrically connected with the MCU respectively; an output end of the power adjustment unit is electrically connected with the LED lamp body. The output brightness of the photosensitive LED lamp is adjustable, and the photosensitive LED lamp is energy-saving and environment-friendly.

The invention discloses an output power adjusting device and method of a mobile terminal. The device comprises a baseband chip, a detecting module and an earphone amplifier. The baseband chip controls the work state of the detecting module according to the plug state of an earphone. When the earphone is plugged in, the detecting module outputs corresponding feedback voltages to the baseband chip according to earphone impedance. The baseband chip adjusts the gain of the earphone amplifier according to the feedback voltages to adjust the output power of the mobile terminal. Thus, the output power of the mobile terminal can be automatically adjusted according to the impedance of the earphone plugged in so as to guarantee that volumes output by earphones are the same under the condition that earphones with different impedances are connected. The problems that existing default loads are different from the load of the earphone plugged in, but output voltages are fixed, and consequently, the volume output by the earphone is too large or too small are solved.

An induction heating device that can heat aluminum pans and the like while suppressing pan vibration noise. During the on-time of the second switching means 57, energy is accumulated at the choke coil 54, while a resonant current having a period shorter than the on-time of the second switching means 57 or the excitation time of the first switching means 55 flows in the heating coil 59. generated at , so that the energy accumulated at the choke coil 54 is transferred to the second smoothing capacitor 62 during the off period of the second switching device 57 , that is, during the on period of the first switching device 55 . The output power is then supplied from the smoothing capacitor 62 to the heating coil 59, thereby reducing pan vibration noise caused by the pulsating current of the input voltage.

The invention discloses an information processing method and electronic equipment. The information processing method is applied to first electronic equipment and second electronic equipment, wherein the first electronic equipment is capable of communicating with the second electronic equipment; and the second electronic equipment can be charged through the first electronic equipment. The information processing method comprises the following steps: in the process of charging the second electronic equipment through the first electronic equipment, receiving, by the first electronic equipment, first information sent by the second electronic equipment according to a first strategy; judging the charging state of the second electronic equipment according to the first information and generating a first instruction when determining that the second electronic equipment is in charging abnormal state; and executing a first operation on the basis of the first instruction, wherein the first operation is used for reducing the output power consumption.

The embodiment of the invention provides a charging facility control method, system, main controller and controller, so as to enable a charging facility to recognize an AC-DC power module in a power cabinet, select a corresponding power module according to the type of an electric vehicle, distribute corresponding power and improve the portability and the compatibility of the charging facility control system. The above charging facility control system can comprise a power cabinet main controller, two or more than three power module controllers and two or more than three power modules, wherein the power cabinet main controller is used for judging the type of an electric vehicle connected to the charging facility control system, selecting a power module controller which needs to be started according to the type of the electric vehicle and sending a control instruction to the selected power module controller; and the two or more than three power module controllers are connected with the power cabinet main controller for receiving the control instruction of the power cabinet main controller and sending a power module control instruction to a power module under the jurisdiction.

The invention provides a primary frequency modulation control method and a related device. The method comprises the steps: obtaining the target power of primary frequency modulation of a current control period and the target power variation of the target power relative to the target power of a previous control period during the primary frequency modulation; and when the target power variation is not a preset threshold value and the working state of an energy storage system corresponding to the target power variationis available, preferentially adjusting the charging and discharging power of the energy storage system, and when the working state of the energy storage system corresponding to the target power variation is unavailable, preferentially adjusting the power generation power of the new energy power generation system. According to the invention, the energy storage system is introduced to carry out primary frequency modulation control, so that when the power generation frequency of the new energy power generation system deviates from the target frequency far, the output power of the power system is rapidly stabilized at the target power by utilizing the cooperation of the charging and discharging control of the energy storage system and the power generation control of the new energy power generation system so as to ensure the working efficiency and the working stability of the power system.

The invention discloses a main generator excitation current variable-level control circuit adopted when locomotive microcomputer excitation control fails. The control circuit comprises a locomotive microcomputer, a locomotive power system, a driver controller, a traction control circuit, a main generator microcomputer excitation loop and a main generator fault excitation loop. The driver controller is provided with a first traction gear, a second traction gear, a third traction gear, a fourth traction gear, a fifth traction gear, a sixth traction gear, a seventh traction gear and an eighth traction gear. A first contactor, a second contactor, a third contactor and a fourth contactor are connected to the traction control circuit. A locomotive fault excitation resistor R1, a locomotive fault excitation resistor R2, a locomotive fault excitation resistor R3 and a locomotive fault excitation resistor R4 are connected to the main generator fault excitation loop. A normally-open contact K1 of the first contactor, a normally-closed contact L4 of the fourth contactor and the locomotive fault excitation resistor R1 are sequentially connected in series and then connected with the locomotive power system. A normally-open contact K2 of the second contactor, a normally-open contactor K3 of the third contactor and a normally-open contact K4 of the fourth contactor are correspondingly connected with the locomotive fault excitation resistor R2, the locomotive fault excitation resistor R3 and the locomotive fault excitation resistor R4 in series respectively and then connected to the locomotive power system, the output power of a locomotive main generator can be adjusted under the fault excitation working condition, the traction power of a locomotive axle is maximal, and the traction capacity of a locomotive is greatly improved.

The invention provides a method and device for adjusting output power of a household appliance and the household appliance. The method comprises the steps that the battery temperature of a battery pack of the household appliance is acquired; whether the battery temperature is less than a first temperature threshold is determined; the temperature rise rate of the battery pack is obtained; when thebattery temperature is less than the first temperature threshold, the maximum output current supported by the battery pack is determined according to the temperature rise rate; according to the maximum output current of the battery pack, the output power of the household appliance is adjusted, and the adjusted working current of the household appliance is smaller than or equal to the maximum output current supported by the battery pack.

The invention discloses an electric bicycle transmission device, which comprises a center shaft, a seal ring, a retainer ring, a hall assembly and a lock end cover, wherein the seal ring, the retainer ring, the hall assembly and the lock end cover are sequentially distributed from inside to outside along the axis direction of the center shaft and movably sleeve outside the center shaft; the lock end cover and a front drive housing are in threaded lock fixation, thereby pressing and fixing the seal ring, the retainer ring and the hall assembly between the lock end cover and the front drive housing; and the center shaft is fixedly provided with speed sensing magnet steel corresponding to the hall assembly. The electric bicycle transmission device is wide in application range, so that stable transmission of the center shaft and a rear wheel of a bicycle can be ensured and the problems that a user is accidentally injured and clothes of the user are stained, and a traditional chain transmission device needs to be frequently maintained due to the fact that the traditional chain transmission device is easily broken or damaged in use are solved.

The invention discloses a control circuit of a high-efficient induction heating quenching machine tool. The control circuit comprises an induction heater and a control circuit, and is characterized in that the control circuit comprises a three-phase alternating current bridge type rectifier circuit module, a power synthesis circuit module and an LC (inductor-capacitor) oscillation circuit module, wherein the power synthesis circuit module is used for performing power synthesis and then outputting to the LC oscillation circuit module; and in the LC oscillation circuit module, a primary coil L of a high-frequency quenching transformer is connected with an oscillation capacitor C to form a parallel resonance circuit, and a secondary level of the high-frequency quenching transformer is connected with the induction heater. Due to the adoption of the structure, the efficiency of the whole machine is high, and units of the power module comprise a transistor and other auxiliary semiconductor devices, so that the structure is compact, the self-loss is small, and the efficiency of the whole machine can achieve above 85%; and the output power is convenient to adjust, the reaction speed is high, the control is accurate, and the heating conditions can be selected arbitrarily. The control device disclosed by the invention further has the characteristics of simple structure, convenience in maintenance, safety and reliability.

The invention discloses portable energy storage equipment with a heat dissipation wind tunnel structure. The portable energy storage equipment comprises an equipment body. A handle is fixedly installed at the top of the equipment body. A first ventilation opening and a second ventilation opening are formed in the two sides of the equipment body respectively. One side of the interior of the equipment body is provided with a first air channel, and the other side of the interior of the equipment body is provided with a second air channel. A first heat dissipation fan, a first retardation plate and a second retardation plate are sequentially arranged on the inner side of the first air channel from left to right. A ventilation cavity is formed in the center of the inner side of the equipment body, the first air channel is communicated with the second air channel through the ventilation cavity, and refrigeration sheets are fixedly installed at the top of the inner side and the bottom of theinner side of the ventilation cavity. A third retardation plate, a fourth retardation plate and a second heat dissipation fan are sequentially arranged on the inner side of the second air channel fromleft to right. According to the portable energy storage equipment, heat generated in the equipment body is taken away through low-speed airflow by arranging the heat dissipation wind tunnel, so thatrapid heat dissipation is achieved; and noise generated by heat dissipation is eliminated, so that the service life of the heat dissipation fans is prolonged.

The invention provides a temperature balance control method and device, and relates to the technical field of hair removal instruments. The method comprises the steps that the current temperature of a refrigeration module is collected; when the current temperature is higher than a preset temperature threshold value, the refrigeration module is started, so that the refrigeration module reduces the current temperature to the preset temperature threshold value; under the condition that the current temperature rises again, if a load is connected into the refrigeration module and the hair removal instrument is in a lighting state, the state information of the hair removal instrument in the lighting state is extracted, and the load value of the load is determined according to the state information; based on the corresponding relation between the preset load value and the duty ratio of PWM, the duty ratio of the PWM is adjusted according to the load value; and finally, the output power of the refrigeration module is controlled based on the duty ratio of the PWM. According to the method, the exact load value can be obtained through the state information of the hair removal instrument, and then the corresponding duty ratio of the PWM is determined through the load value, so that the output power of the refrigeration module is adjusted, and the refrigeration module is rapidly stabilized at the preset temperature threshold value.